#include <gtest/gtest.h>
#include "conversation_manager.h"


class ConversationTest : public ::testing::Test {
    protected:
        CollectionManager & collectionManager = CollectionManager::get_instance();
        Store* store;
        std::atomic<bool> quit = false;
        nlohmann::json model = R"({
            "id": "0",
            "history_collection": "conversation_store",
            "ttl": 86400
        })"_json;
        void SetUp() override {
            std::string state_dir_path = "/tmp/typesense_test/conversation_test";
            system(("rm -rf "+state_dir_path+" && mkdir -p "+state_dir_path).c_str());

            store = new Store(state_dir_path);
            collectionManager.init(store, 1.0, "auth_key", quit);
            collectionManager.load(8, 1000);

            nlohmann::json schema_json = R"({
                "name": "conversation_store",
                "fields": [
                    {
                        "name": "conversation_id",
                        "type": "string"
                    },
                    {
                        "name": "role",
                        "type": "string",
                        "index": false
                    },
                    {
                        "name": "message",
                        "type": "string",
                        "index": false
                    },
                    {
                        "name": "timestamp",
                        "type": "int32",
                        "sort": true
                    },
                    {
                        "name": "model_id",
                        "type": "string"
                    }
                ]
            })"_json;

            collectionManager.create_collection(schema_json);
            ConversationModelManager::insert_model_for_testing("0", model);
        }

        void TearDown() override {
            collectionManager.dispose();
            delete store;
        }
};


TEST_F(ConversationTest, CreateConversation) {
    nlohmann::json conversation = nlohmann::json::array();
    auto create_res = ConversationManager::get_instance().add_conversation(conversation, model);
    ASSERT_TRUE(create_res.ok());
}

TEST_F(ConversationTest, CreateConversationInvalidType) {
    nlohmann::json conversation = nlohmann::json::object();
    auto create_res = ConversationManager::get_instance().add_conversation(conversation, "conversation_store");
    ASSERT_FALSE(create_res.ok());
    ASSERT_EQ(create_res.code(), 400);
    ASSERT_EQ(create_res.error(), "Conversation is not an array");
}

TEST_F(ConversationTest, GetInvalidConversation) {
    auto get_res = ConversationManager::get_instance().get_conversation("qwerty");
    ASSERT_FALSE(get_res.ok());
    ASSERT_EQ(get_res.code(), 404);
    ASSERT_EQ(get_res.error(), "Conversation not found");
}

TEST_F(ConversationTest, AppendConversation) {
    nlohmann::json conversation = nlohmann::json::array();
    nlohmann::json message = nlohmann::json::object();
    message["user"] = "Hello";
    conversation.push_back(message);
    auto create_res = ConversationManager::get_instance().add_conversation(conversation, model);

    ASSERT_TRUE(create_res.ok());
    std::string conversation_id = create_res.get();
    LOG(INFO) << conversation_id;
    auto append_res = ConversationManager::get_instance().add_conversation(conversation, model, conversation_id);
    ASSERT_TRUE(append_res.ok());
    ASSERT_EQ(append_res.get(), conversation_id);
    
    auto get_res = ConversationManager::get_instance().get_conversation(conversation_id);

    ASSERT_TRUE(get_res.ok());
    ASSERT_TRUE(get_res.get()["conversation"].is_array());
    ASSERT_EQ(get_res.get()["id"], conversation_id);
    ASSERT_EQ(get_res.get()["conversation"].size(), 2);
    ASSERT_EQ(get_res.get()["conversation"][0]["user"], "Hello");
    ASSERT_EQ(get_res.get()["conversation"][1]["user"], "Hello");
}


TEST_F(ConversationTest, AppendInvalidConversation) {
    nlohmann::json conversation = nlohmann::json::array();
    nlohmann::json message = nlohmann::json::object();
    message["user"] = "Hello";
    auto create_res = ConversationManager::get_instance().add_conversation(conversation, model);

    ASSERT_TRUE(create_res.ok());
    std::string conversation_id = create_res.get();

    message = "invalid";

    auto append_res = ConversationManager::get_instance().add_conversation(message, model, conversation_id);
    ASSERT_FALSE(append_res.ok());
    ASSERT_EQ(append_res.code(), 400);
    ASSERT_EQ(append_res.error(), "Conversation is not an array");
}

TEST_F(ConversationTest, DeleteConversation) {
    nlohmann::json conversation = nlohmann::json::array();
    nlohmann::json message = nlohmann::json::object();
    message["user"] = "Hello";
    conversation.push_back(message);
    auto create_res = ConversationManager::get_instance().add_conversation(conversation, model);
    ASSERT_TRUE(create_res.ok());
    std::string conversation_id = create_res.get();
    LOG(INFO) << conversation_id;

    auto delete_res = ConversationManager::get_instance().delete_conversation(conversation_id);
    LOG(INFO) << delete_res.error();
    ASSERT_TRUE(delete_res.ok());

    auto delete_res_json = delete_res.get();

    ASSERT_EQ(delete_res_json["id"], conversation_id);

    auto get_res = ConversationManager::get_instance().get_conversation(conversation_id);
    ASSERT_FALSE(get_res.ok());
    ASSERT_EQ(get_res.code(), 404);
    ASSERT_EQ(get_res.error(), "Conversation not found");
}

TEST_F(ConversationTest, DeleteInvalidConversation) {
    auto delete_res = ConversationManager::get_instance().delete_conversation("qwerty");
    ASSERT_FALSE(delete_res.ok());
    ASSERT_EQ(delete_res.code(), 404);
    ASSERT_EQ(delete_res.error(), "Conversation not found");
}

TEST_F(ConversationTest, TruncateConversation) {
    nlohmann::json conversation = nlohmann::json::array();
    nlohmann::json message = nlohmann::json::object();
    message["user"] = "Hello";
    for (int i = 0; i < 1000; i++) {
        conversation.push_back(message);
    }

    auto truncated = ConversationManager::get_instance().truncate_conversation(conversation, 100);
    ASSERT_TRUE(truncated.ok());
    ASSERT_TRUE(truncated.get().size() < conversation.size());
    ASSERT_TRUE(truncated.get().dump(0).size() < 100);
}

TEST_F(ConversationTest, TruncateConversationEmpty) {
    nlohmann::json conversation = nlohmann::json::array();
    auto truncated = ConversationManager::get_instance().truncate_conversation(conversation, 100);
    ASSERT_TRUE(truncated.ok());
    ASSERT_TRUE(truncated.get().size() == 0);
}

TEST_F(ConversationTest, TruncateConversationInvalidType) {
    nlohmann::json conversation = nlohmann::json::object();
    auto truncated = ConversationManager::get_instance().truncate_conversation(conversation, 100);
    ASSERT_FALSE(truncated.ok());
    ASSERT_EQ(truncated.code(), 400);
    ASSERT_EQ(truncated.error(), "Conversation history is not an array");
}

TEST_F(ConversationTest, TruncateConversationInvalidLimit) {
    nlohmann::json conversation = nlohmann::json::array();
    auto truncated = ConversationManager::get_instance().truncate_conversation(conversation, 0);
    ASSERT_FALSE(truncated.ok());
    ASSERT_EQ(truncated.code(), 400);
    ASSERT_EQ(truncated.error(), "Limit must be positive integer");
}

TEST_F(ConversationTest, TestConversationExpire) {
    nlohmann::json conversation = nlohmann::json::array();
    nlohmann::json message = nlohmann::json::object();
    message["user"] = "Hello";
    conversation.push_back(message);
    auto create_res = ConversationManager::get_instance().add_conversation(conversation, model);

    ASSERT_TRUE(create_res.ok());
    std::string conversation_id = create_res.get();
    
    ConversationManager::get_instance().clear_expired_conversations();

    auto get_res = ConversationManager::get_instance().get_conversation(conversation_id);
    ASSERT_TRUE(get_res.ok());
    ASSERT_TRUE(get_res.get()["conversation"].is_array());
    ASSERT_EQ(get_res.get()["id"], conversation_id);
    ASSERT_EQ(get_res.get()["conversation"].size(), 1);

    ConversationManager::get_instance()._set_ttl_offset(24 * 60 * 60 * 2);
    LOG(INFO) << "Clearing expired conversations";
    ConversationManager::get_instance().clear_expired_conversations();
    LOG(INFO) << "Cleared expired conversations";

    get_res = ConversationManager::get_instance().get_conversation(conversation_id);
    ASSERT_FALSE(get_res.ok());
    ASSERT_EQ(get_res.code(), 404);
    ASSERT_EQ(get_res.error(), "Conversation not found");

    ConversationManager::get_instance()._set_ttl_offset(0);
}


TEST_F(ConversationTest, TestInvalidConversationCollection) {
    nlohmann::json schema_json = R"({
        "name": "conversation_store2",
        "fields": [
            {
                "name": "lorem",
                "type": "string"
            }
        ]
    })"_json;

    auto coll = collectionManager.create_collection(schema_json).get();
    auto res = ConversationManager::get_instance().validate_conversation_store_schema(coll);
    ASSERT_FALSE(res.ok());
    ASSERT_EQ(res.code(), 400);
    ASSERT_EQ(res.error(), "Schema is missing `conversation_id` field");
}